mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-27 06:34:11 +08:00
cae9dc35ed
Use CONFIG_KASAN_STACK to enable stack tagging. Note, that HWASAN short granules [1] are disabled. Supporting those will require more kernel changes. [1] https://clang.llvm.org/docs/HardwareAssistedAddressSanitizerDesign.html Signed-off-by: Andrey Konovalov <andreyknvl@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Cc: Alexander Potapenko <glider@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Elena Petrova <lenaptr@google.com> Cc: Marco Elver <elver@google.com> Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> Cc: Walter Wu <walter-zh.wu@mediatek.com> Cc: Ard Biesheuvel <ardb@kernel.org> Link: http://lkml.kernel.org/r/e7febb907b539c3730780df587ce0b38dc558c3d.1596199677.git.andreyknvl@google.com Link: http://lkml.kernel.org/r/99f7d90a4237431bf5988599fb41358e92876eb0.1596544734.git.andreyknvl@google.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
52 lines
1.5 KiB
Makefile
52 lines
1.5 KiB
Makefile
# SPDX-License-Identifier: GPL-2.0
|
|
ifdef CONFIG_KASAN
|
|
CFLAGS_KASAN_NOSANITIZE := -fno-builtin
|
|
KASAN_SHADOW_OFFSET ?= $(CONFIG_KASAN_SHADOW_OFFSET)
|
|
endif
|
|
|
|
ifdef CONFIG_KASAN_GENERIC
|
|
|
|
ifdef CONFIG_KASAN_INLINE
|
|
call_threshold := 10000
|
|
else
|
|
call_threshold := 0
|
|
endif
|
|
|
|
CFLAGS_KASAN_MINIMAL := -fsanitize=kernel-address
|
|
|
|
cc-param = $(call cc-option, -mllvm -$(1), $(call cc-option, --param $(1)))
|
|
|
|
# -fasan-shadow-offset fails without -fsanitize
|
|
CFLAGS_KASAN_SHADOW := $(call cc-option, -fsanitize=kernel-address \
|
|
-fasan-shadow-offset=$(KASAN_SHADOW_OFFSET), \
|
|
$(call cc-option, -fsanitize=kernel-address \
|
|
-mllvm -asan-mapping-offset=$(KASAN_SHADOW_OFFSET)))
|
|
|
|
ifeq ($(strip $(CFLAGS_KASAN_SHADOW)),)
|
|
CFLAGS_KASAN := $(CFLAGS_KASAN_MINIMAL)
|
|
else
|
|
# Now add all the compiler specific options that are valid standalone
|
|
CFLAGS_KASAN := $(CFLAGS_KASAN_SHADOW) \
|
|
$(call cc-param,asan-globals=1) \
|
|
$(call cc-param,asan-instrumentation-with-call-threshold=$(call_threshold)) \
|
|
$(call cc-param,asan-stack=$(CONFIG_KASAN_STACK)) \
|
|
$(call cc-param,asan-instrument-allocas=1)
|
|
endif
|
|
|
|
endif # CONFIG_KASAN_GENERIC
|
|
|
|
ifdef CONFIG_KASAN_SW_TAGS
|
|
|
|
ifdef CONFIG_KASAN_INLINE
|
|
instrumentation_flags := -mllvm -hwasan-mapping-offset=$(KASAN_SHADOW_OFFSET)
|
|
else
|
|
instrumentation_flags := -mllvm -hwasan-instrument-with-calls=1
|
|
endif
|
|
|
|
CFLAGS_KASAN := -fsanitize=kernel-hwaddress \
|
|
-mllvm -hwasan-instrument-stack=$(CONFIG_KASAN_STACK) \
|
|
-mllvm -hwasan-use-short-granules=0 \
|
|
$(instrumentation_flags)
|
|
|
|
endif # CONFIG_KASAN_SW_TAGS
|